Recent content by God's Pen

i think I'm getting somewhere,thank u so mush for your help. :smile:

thank you. but if i and j are just dummy variables and it doesn't matter which one we put. how could we have P_i(a_i)=1 and P_j(a_i)=0 ?? ?

hello everyone:smile: for i=1,2,...,(n+1) let P_{i}(X)=\frac{\prod_{1\leq j\leq n+1,j\neq i}(X-a_j)}{\prod_{1\leq j\leq n+1,j\neq i}(a_i-a_j)} prove that (P_1,P_2,...P_{n+1}) is basis of \mathbb{R}_{n}[X] . i already have an answer but i don't understand some of it. ... we have...

yes,i meant N,is it okay ?

Hello:smile: suppose we have a gas (ideal) inside that gas there are particles (N particles) and each particle has a certain velocity v. i want to find the average velocity of all the particles inside that gas. would it be \mathbb{V}=\frac{\sum_{1}^{n}v_i}{N} \mathbb{V} the average...

thanks:smile:

in my book,i found that the octet rule works only with the elements C,N,O,F. ? i don't get it ??:confused:

Hello I want to know the ideas and the formulas used to calculate the mass of Earth. thanks.

for me,there is no "best mathematicians" or "best physicians" i think they all make the best.

the AVERAGE kinetic energy is it the same as the Kinetic energy ? thanks.

Hello:smile: from p= \frac{1}{3} nmv^{2} find the noble Gaz equation PV=RT for one mole of gaz. thanks.